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Old 01-20-2016, 04:10 PM   #1
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Blow in insulation into Rafters


1906 American Four square house with balloon framing and dormered 2nd floor. I received a quote for blow in cellulose. We can't secure baffles in every rafter since 2nd floor is partially dormered. In the undormered areas my rafters have about 5-10 ft of space that is covered over with drywall from my 2nd floor ceiling. I do not have access to staple the baffles but I can slide them down in there. My house does have visual sunlight that appear to have breathable working soffits. The light that I see is from and 1 1/2" crack in my eaves which are from my gutter slightly falling. I do not have vents underneath the eaves or soffits just the space I mentioned which may disappear once I get new gutters. My concern is that if they just blow insulation in to all my rafters without putting any baffles am I inviting a bad scenario of ice damning to occur? Should I have them attempt to slide the baffles in without being able to secure them to the roof and to then blow insulation over the baffle. sounds a bit 1/2 ASS I know. I have about 1000sq of space in attic and was able to install 8 baffles from both bath ooms I had renovated. 5 on one side of house and 3 on the other side of house all in the same area.

Last edited by HAVOC88; 01-20-2016 at 04:13 PM. Reason: corrected title.
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Old 01-21-2016, 10:30 AM   #2
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Any pictures?

You are in a bit of a pinch. Some folks will dense pack those sections if the venting of the roof is otherwise sufficient. If that blocks off a bunch of the soffits, it can create other issues.

While it isn't ideal, you can sometimes snake the baffle down there with some batt insulation behind it.
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Old 01-21-2016, 01:11 PM   #3
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I Imagined snaking the baffles in only with blow in afterward. I would think the nails from the shingles would catch the batt insulation.
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Old 01-21-2016, 01:23 PM   #4
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Slide then down together...but you are probably right. Can't tell for sure without seeing it.
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